The driver of a train that was targeted by a knifeman has told jurors he had approximately 10 seconds to react as the attack unfolded.

Andrew Johnson was driving a London Overground service in May 2022 when a man began stabbing passengers. Johnson testified in court that he heard an announcement over the intercom stating, "there's a knifeman stabbing people." This alert gave him a limited window to take action.

The incident has led to a trial for the accused attacker. Johnson's testimony provides crucial insight into the moments leading up to the discovery of the attack and the driver's immediate actions in response to the unfolding crisis.